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NEW QUESTION: 1
シミュレーション
クリックして各目標を展開します。 Azureポータルに接続するには、ブラウザーのアドレスバーにhttps://portal.azure.comと入力します。






すべてのタスクの実行が終了したら、「次へ」ボタンをクリックします。
[次へ]ボタンをクリックすると、ラボに戻ることができないことに注意してください。採点は、残りの試験を完了する間、バックグラウンドで発生します。
概要
試験の次のセクションはラボです。このセクションでは、ライブ環境で一連のタスクを実行します。ほとんどの機能はライブ環境と同様に使用できますが、一部の機能（コピーアンドペースト、外部Webサイトへの移動機能など）は設計上不可能です。スコアリングは、ラボで説明されているタスクを実行した結果に基づいています。つまり、タスクをどのように達成するかは問題ではありません。タスクを正常に実行すると、そのタスクのクレジットを獲得できます。
ラボのタイミングは個別ではなく、この試験には複数のラボが必要な場合があります。各ラボを完了するのに必要な時間を使用できます。ただし、時間を適切に管理して、指定された時間内にラボと試験の他のすべてのセクションを完了することができるようにする必要があります。
ラボ内で[次へ]ボタンをクリックして作業を送信すると、ラボに戻ることはできません。
ラボを開始するには
[次へ]ボタンをクリックして、ラボを開始できます。
大量の企業データをAzure Storageに移行し、古いハードウェアに保存されているファイルをAzure Storageにバックアップする予定です。
corpdatalog7523690リソースグループにcorpdata7523690n1という名前のストレージアカウントを作成する必要があります。ソリューションは次の要件を満たしている必要があります。



Azureポータルから何をすべきですか？
A. ステップ1：Azureポータルで、[すべてのサービス]をクリックします。リソースのリストに「ストレージアカウント」と入力します。入力を開始すると、入力に基づいてリストがフィルタリングされます。ストレージアカウントを選択します。
ステップ2：表示される[ストレージアカウント]ウィンドウで、[追加]を選択します。
ステップ3：ストレージアカウントを作成するサブスクリプションを選択します。
ステップ4：[リソースグループ]フィールドで、corpdatalog7523690を選択します。

ステップ5：ストレージアカウントの名前を入力します：corpdata7523690n1
ステップ6：アカウントの種類を選択：汎用v2アカウント（ほとんどのシナリオに推奨）汎用v2アカウントはほとんどのシナリオに推奨されます。 。汎用v2アカウントは、Azure Storageのギガバイトあたりの最低キャパシティ価格と業界競争力のあるトランザクション価格を提供します。
ステップ7：レプリケーションの場合：読み取りアクセスの地理的冗長ストレージ（RA-GRS）読み取りアクセスの地理的冗長ストレージ（RA-GRS）は、ストレージアカウントの可用性を最大化します。 RA-GRSは、2つの地域にまたがるジオレプリケーションに加えて、セカンダリロケーションのデータへの読み取り専用アクセスを提供します。
B. ステップ1：Azureポータルで、[すべてのサービス]をクリックします。リソースのリストに「ストレージアカウント」と入力します。入力を開始すると、入力に基づいてリストがフィルタリングされます。ストレージアカウントを選択します。
ステップ2：表示される[ストレージアカウント]ウィンドウで、[追加]を選択します。
ステップ3：ストレージアカウントを作成するサブスクリプションを選択します。
ステップ4：[リソースグループ]フィールドで、corpdatalog7523690を選択します。

ステップ5：ストレージアカウントの名前を入力します：corpdata7523690n1
ステップ6：アカウントの種類を選択：汎用v2アカウント（ほとんどのシナリオに推奨）汎用v2アカウントはほとんどのシナリオに推奨されます。 。汎用v2アカウントは、Azure Storageのギガバイトあたりの最低キャパシティ価格と業界競争力のあるトランザクション価格を提供します。
ステップ7：レプリケーションの場合：読み取りアクセスの地理的冗長ストレージ（RA-GRS）読み取りアクセスの地理的冗長ストレージ（RA-GRS）は、ストレージアカウントの可用性を最大化します。 RA-GRSは、2つの地域にまたがるジオレプリケーションに加えて、セカンダリロケーションのデータへの読み取り専用アクセスを提供します。
Answer: B
Explanation:
References:
https://docs.microsoft.com/en-us/azure/storage/common/storage-quickstart-create-account
https://docs.microsoft.com/en-us/azure/storage/common/storage-account-overview

NEW QUESTION: 2
Which two options are advantages of a spine and leaf architecture? (Choose two )
A. robust multipathing
B. exponential scalability
C. traffic that is optimized for east-west communication
D. star topology
E. traffic that is optimized for north-south communication
Answer: A,B

NEW QUESTION: 3
A network analyst received a number of reports that impersonation was taking place on the network. Session tokens w ere deployed to mitigate this issue and defend against which of the following attacks?
A. Replay
B. Smurf
C. DDoS
D. Ping of Death
Answer: A
Explanation:
A replay attack (also known as playback attack) is a form of network attack in which a valid data transmission is maliciously or fraudulently repeated or delayed. This is carried out either by the originator or by an adversary who intercepts the data and retransmits it, possibly as part of a masquerade attack by IP packet substitution (such as stream cipher attack).
For example: Suppose Alice wants to prove her identity to Bob. Bob requests her password as proof of identity, which
Alice dutifully provides (possibly after some transformation like a hash function); meanwhile, Eve is eavesdropping on the conversation and keeps the password (or the hash). After the interchange is over, Eve (posing as Alice) connects to
Bob; when asked for a proof of identity, Eve sends Alice's password (or hash) read from the last session, which Bob accepts thus granting access to Eve.
Countermeasures: A way to avoid replay attacks is by using session tokens: Bob sends a one-time token to Alice, w hich Alice uses to transform the password and send the result to Bob (e.g. computing a hash function of the session token appended to the password). On his side Bob performs the same computation; if and only if both values match, the login is successful. Now suppose Eve has captured this value and tries to use it on another session; Bob sends a different session token, and when Eve replies with the captured value it will be different from Bob's computation.
Session tokens should be chosen by a (pseudo-) random process. Otherwise Eve may be able to pose as Bob, presenting some predicted future token, and convince Alice to use that token in her transformation. Eve can then replay her reply at a later time (when the previously predicted token is actually presented by Bob), and Bob will accept the authentication.
One-time passwords are similar to session tokens in that the password expires after it has been used or after a very short amount of time. They can be used to authenticate individual transactions in addition to sessions. The technique has been widely implemented in personal online banking systems.
Bob can also send nonces but should then include a message authentication code (MAC), which Alice should check.
Timestamping is another way of preventing a replay attack. Synchronization should be achieved using a secure protocol. For example Bob periodically broadcasts the time on his clock together with a MAC. When Alice wants to send Bob a message, she includes her best estimate of the time on his clock in her message, which is also authenticated. Bob only accepts messages for which the timestamp is within a reasonable tolerance. The advantage of this scheme is that Bob does not need to generate (pseudo-) random numbers, with the trade-off being that replay attacks, if they are performed quickly enough i.e. within that 'reasonable' limit, could succeed.
Incorrect Answers:
B. A Distributed Denial of Service (DDoS) attack is an attack from several different computers targeting a single computer.
One common method of attack involves saturating the target machine with external communications requests, so much so that it cannot respond to legitimate traffic, or responds so slowly as to be rendered essentially unavailable.
Such attacks usually lead to a server overload.
A distributed denial-of-service (DDoS) attack occurs when multiple systems flood the bandwidth or resources of a targeted system, usually one or more web servers. Such an attack is often the result of multiple compromised systems
(for example a botnet) flooding the targeted system with traffic. When a server is overloaded with connections, new connections can no longer be accepted. Session tokens are not used to defend against this type of attack.
C. A smurf attack is a type of network security breach in which a network connected to the Internet is swamped with replies to ICMP echo (PING) requests. A smurf attacker sends PING requests to an Internet broadcast address. These are special addresses that broadcast all received messages to the hosts connected to the subnet. Each broadcast address can support up to 255 hosts, so a single PING request can be multiplied 255 times. The return address of the request itself is spoofed to be the address of the attacker's victim. All the hosts receiving the PING request reply to this victim's address instead of the real sender's address. A single attacker sending hundreds or thousands of these
PING messages per second can fill the victim's T-1 (or even T-3) line with ping replies, bring the entire Internet service to its knees.
Smurfing falls under the general category of Denial of Service attacks -- security attacks that don't try to steal information, but instead attempt to disable a computer or network. Session tokens are not used to defend against this type of attack.
D. A ping of death is a type of attack on a computer that involves sending a malformed or otherwise malicious ping to a computer.
A correctly formed ping message is typically 56 bytes in size, or 84 bytes when the Internet Protocol [IP] header is considered. Historically, many computer systems could not properly handle a ping packet larger than the maximum
IPv4 packet size of 65535bytes. Larger packets could crash the target computer.
In early implementations of TCP/IP, this bug was easy to exploit. This exploit affected a wide variety of systems, including Unix, Linux, Mac, Windows, printers, and routers.
Generally, sending a 65,536-byte ping packet violates the Internet Protocol as documented in RFC 791, but a packet of such a size can be sent if it is fragmented; when the target computer reassembles the packet, a buffer overflow can occur, which often causes a system crash.
Later a different kind of ping attack became widespread-ping flooding simply floods the victim with so much ping traffic that normal traffic fails to reach the system, a basic denial-of-service attack.
Session tokens are not used to defend against this type of attack.
References:
http://en.wikipedia.org/wiki/Replay_attack
http://www.webopedia.com/TERM/S/smurf.html
http://en.wikipedia.org/wiki/Ping_of_death

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